Page Comparison

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However we only have a single detailed sample (with less data and no load) of the downstream requests from the check out API. That sample is not representative of the range of response times likely present in a whole performance test run using more realistic load parameters.

Thus, this analysis has to assume that the sample is representative whilst also interpreting it skeptically (because it is likely far more optimistic than the heavier load scenarios).

We also do not know:

• why the response times of the constituent parts do not equate to the overall response time
• what amount of time Okapi takes to process requests / responses
• what amount of time mod-circulation takes to use this information to make decisions e.g. to apply the circulation rules

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At the moment, the average request in our low load sample takes 62ms (including proxying overhead). This is more than double the budget we have available and we can expect the situation to be worse under load.

Whilst there are some outliers (that are still likely lower than under load numbers) that push up this number, I think this indicates the degree of challenge we have with the current approach.

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Intent	Endpoint	Destination Module	Sample Response Time (ms)	Sample Response Time of Token Check (ms)
Initial request				99
Fetch user (making the request)	GET /users/{id}	mod-users	6
Fetch permissions	GET /perms/users?query=userId=={id}	mod-permissions	16
Generate downstream token			12
Fetch user (patron) by barcode	GET /users?query=barcode=={barcode}	mod-users	13	86
Fetch manual blocks	GET /manualblocks?query=userId=={userId}	mod-feesfines	133	7
Fetch automated blocks	GET /automated-patron-blocks/{userId}	mod-patron-blocks	546*	27
Fetch item by barcode	GET /item-storage/items?query=barcode=={barcode}	mod-inventory-storage	163**	10
Fetch holdings	GET /holdings-storage/holdings/{id}	mod-inventory-storage	57	9
Fetch instance	GET /instance-storage/instances/{id}	mod-inventory-storage	22	7
Fetch location	GET /locations/{id}	mod-inventory-storage	9	13
Fetch library	GET /location/units/libraries/{id}	mod-inventory-storage	10	7
Fetch campus	GET /location/units/campuses/{id}	mod-inventory-storage	10	7
Fetch institution	GET /location/units/institutions/{id}	mod-inventory-storage	11	7
Fetch service point	GET /service-points/{id}	mod-inventory-storage	9	8
Fetch material type	GET /material-types/{id}	mod-inventory-storage	8	7
Fetch loan type	GET /loan-types/{id}	mod-inventory-storage	22	8
Fetch existing loans	GET /loan-storage/loans?query=status.name=="Open" and itemId=={itemId}	mod-circulation-storage	9	17
Fetch requests	GET /request-storage/requests?query=itemId=={itemId} and status==("Open - Not yet filled" or "Open - Awaiting pickup" or "Open - In transit" or "Open - Awaiting delivery") sortBy position/sort.ascending	mod-circulation-storage	10	9
Fetch circulation rules	GET /circulation/rules	mod-circulation-storage	18	18
Fetch loan policy	GET /loan-policy-storage/loan-policies/{id}	mod-circulation-storage	10	8
Fetch tenant locale	GET /configurations/entries?query=module=="ORG" and configName=="localeSettings"	mod-configuration	16	10
Fetch overdue fines policies	GET /overdue-fines-policies/{id}	mod-feesfines	19	8
Fetch lost item fees policies	GET /lost-item-fees-policies/{id}	mod-feesfines	11	10
Fetch opening days	GET /calendar/periods/7068e104-aa14-4f30-a8bf-71f71cc15e07/calculateopening?requestedDate={{dueDate}}	mod-calendar	12	8
Fetch user (patron) groups	GET /groups?query=id=={groupId}	mod-users	17	7
Update item status	PUT /item-storage/items/{id}	mod-inventory-storage	194	13
Create loan	POST /loan-storage/loan	mod-circulation-storage	16	8
Update patron action session	POST /patron-action-session-storage/patron-action-sessions	mod-circulation-storage	10	7
Fetch user	GET /users/{id}	mod-users	6	15
Fetch patron notice policy	GET /patron-notice-policy-storage/patron-notice-policies/1a821238-0cd9-48d9-a71a-057d33df0154	mod-circulation-storage	6	7

* The Vega team have already done some work to improve this

** The Core Platform team have already done work to improve this